Attachment to adding-machines



APPLICATION HLED MAR. I5. 1919.

0 2. 9 1H 9 V s 0T vNH w m m a P I N Vl'IN TOR.

Flge

J. C. BURNE.

ATTACHMENT T0 ADDING MACHINES.

APPLICATION FILED MAR. 15. I919.

Patented Nov. 9, 1920.

2 SHEETS-SHEET 2.

INVENTOR.

ATTORNEY.

UNITED STATES PATENT OFFICE.

JAMES CLARENCE BURNE, OF WESTFORD, MASSACHUSETTS, ASSIGNOR TO MONROE CALCULATING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ATTACHMENT T0 ADDING-MACHINES.

Specification of Letters Patent.

Patented Nov. 9, 1920.

Application filed March 15, 1919. Serial No. 282,813.

To all whom it may concern:

Be it known that I, JAMES CLARENCE BURNE, a citizen of the United States, residing at lVestford, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Attachments to Adding-Machines, of which the following is a specification.

This invention relates to calculating machines of the type having a base on which are disposed various keys, and a carriage which is movable transversely thereon and is so connected thereto that part of it can be raised therefrom for various purposes, especially for returning the result dials carried thereby to the zero point.

A similar type of machine is shown in patents to F. S. Baldwin on calculating machine, December 2, 1913, No. 1,080,245, and F. S. Baldwin, on zero setting mechanism, August 6, 1918, No. 1,275,119.

The carriage of such machines is usually slidable transversely with a suitable pivot rod carried in suitable bearings at the back of the base, and also carries a clearout crank.

On this type of machines, there are usually two result dials, one of which is cleared by turning the clearout crank away from the operator, and the other is cleared by lifting the carriage and turning the clearout crank toward the operator.

As now constructed, such machines are provided with a main crank which, with the clearout crank, is operated by the right hand, but not at the same time. It also has a carriage shifting lever operated by the left hand to shift the carriage and also to lift such part of it as can be raised from the base in order to permit the clearout crank to be turned toward the operator for the purpose of returning one of the result dials to zero.

The carriage shifting lever must be held by the left hand or balanced carefully while the clearout crank is being turned toward the operator to return one dial to zero.

This necessitates such left hand being removed from its position on the account which is being tabulated, and the place 13 lost.

The carriage may be raised andheld by the left hand while the clearout crank is turnedby the right hand, but this is less convenient.

The purpose of my device is to provide an attachment operative by the clearout crank alone, without the assistance of the carriage shifting lever or of the left hand in any way. Its operation in turning from the operator is not affected, but in turning toward the operator, it will lift part of the carriage from the body, thus disengaging gears and will hold this part of the carriage in the raised position until the zero is obtained.

Such lifting means must be operative from any position in the traverse of the carriage.

1n the drawing, Figure 1 is a perspective View of a calculating machine with my attachment. Fig. 2 is an elevation of the carriage and adjoining parts from the side of the clearout crank, the carriage being shown in the down position.- Fig. 3 is an elevation similar to Fig. 2 showing the carriage raised. Fig. 4; is a detail View from the front of the machine showing my preferred form of returning spring. Fig. 5 is a plan View of my attachment shown as'provided with two lifting arms. Fig. 6 is a detail view in perspective showing a' modification of my 30 device.

Fig. 7 is a plan View of the carriage in the type of machine to which my device can be attached, the cover being broken away for clearness and some parts of my device being also broken away. Fig. 8 is a sectional elevation on line 88 of Fig. 7 looking from the right. Fig. 9 is a sectionalelevation on line 99 of Fig. 7 looking from the left.

In the drawings, B represents the base or casing of a calculating machine shown as being rectangular;havi11g a back 5, front 8, sides 6 and 7, and top 9, and on the top are dis osed keys A.

t the back is located a pivoted carriage C which is shown as considerably wider than the base and as being carried by and fixed to a rod 10 which is pivotal in and slides in dials 20, each provided with a gear wheel,

of well known construction and O is the main crank at the right of the machine. This shaft 10 is connected with means, shown as including the gears 110 and 111 carried thereby, which engage gears 114; and 12 a r e r spe t vely by he s aft 6 an 8a, which carry the principal series of registering dials with their gears, and the sec- 7 ondary series of registering dials respectively, as shown in patent to Baldwin, No. 1,275,119, August 6, 1918, whereby, when the shaft {20 is rotated in one direction it will set the principal series of dials to" Zero,

and when it "is rotated in the PPQ$i1 direction, it will set the opposite series of dials at Zero. It is considered unnecessary to further describe such zero-setting means,

as a type of such means is explained in detailin said Baldwin patent. I

With such means, it is necessary, in order to disengage the gear wheels of the principal 5 series of registering dials from the gears in the casing, to raise the carriage in order to set back such principal series to zero by the -n m d mean h s ha h e sene al y accomplished by a carriage shifting lever F re s 'e hyth lef h n in h pesitiehr V The above parts are all old.

and also moved to the left orright." To

' r t Pe h arr ag trees must be turned to the dotted line position shown h Fi 1, an ith r'he d th alanced My device comprises a cam H fixed to theshaftOof clearont crank G of form shown; Gam H is shown'as a perfect disk t asee on 41 cu ut I Pre d ti g eans K, whi hisshewh as veh ble hhans rs am 3. which project from the carriage G a sufficient dis whee to p rmi l fti serm 3, which is es from or attached to the long bearing men ber 29 of K, to clear. the carriage, but to. engage the top of base Ber, preferably, the 'top ofvthe spacing part thereofj22 when IQ is revolved in its hangers. Lifting member K is also shown as having a power arm 32 in'Figs. and 2. In Fig. 2, I showastop when free.

F s h arri e h f ng e r, a the t nt of th meeh h h ch is 9. nected in a well known manner with devices her y the pert f t r iage C nearest "the'operator will be lifted when F isturned pin 12 to limitthe downward-motion of arm 32.

When clearout handle G is turned away from the operator in the direction opposite to the arrow in Fig 2, the lifting arm 33 is disengaged from the base, as the power arm 32 is raised and rests idly on the curved surface 42 of cam H. When G is turned toward the operator in the direction of the arrow, however, the power arm 32 is depressed, as shown in Fig. 3, depressing arm 33 which engages the top 9 of base B,and the part of the carriage toward the operator is lifted to such a point that the gears are disengaged by the continued motion of G and cam Y The can; is'so out that, after being lifted, part. of the carriage is kept in the raised position during a great part of the rotation of crank G.

As shown in Fig. ,5, instead of using one lifting arm 33, Ifmay use two, as 33 and 3&1, whereby if one does not strike true on the top of the corrugations in the part 22," the other one w ll, and more even action is Instead of the stop pin 12, I prefer to use afldouble action returning spring shown at 13 of the hairpin type, with the'two arms which extend one above and the other be low power arm 32 and as fixed to the hanger 30 whereby whichever way 32 is moved, it will be brought back to itsjnormal position In Fig. 6, I show a device wherein the clearoutcrank shaft 40 carries a gear 50, whichengages another gear ofthje same size 51 carried idly by stud 52and' fined to cam Cam H proj ets t ward the perato f om t e r t of carriage U in position to engage the tail 61 of a lifting member L, pivoted at 53 to the ar iage and ha ing it he nd 62 nt down'at be as shown.

A turn of G toward the operator will turn H in the opposite direction and, when tail 61 falls into cut-away part 51, its liftng end 6% is dep e sed u i i hsege ba e somewhat modified 7 B, when the-action continues and part of the carriage is lifted as in the first con struct on.

SQ far a th pe a ien f my att hment is con rned, th spa ng Pa er ra l 2 r e r garded a Pa ef th b eh hgmemhe she l as 9., an h per of lifting member L between the end of mi! 61 and the part 6 may e egarded a er posi on he r iag th y b Th whole" of members K, L, or their equivalents, may be regarded and described as lifting i 7 means. which is of such length that it extends to m n hto -e -y pa 4 as hown I claim": 7

1, In a calculatingmachine, 'havinga 'ba se,a carriage movable tra-nsversely'thereansm s h member extend ng f om p eats the l ar st ran jt the b in W t on and so connected thereto that part of it can be raised therefrom, a clearout crank carried by the carriage, and result dials carried by the carriage and operative by the clearout crank when said part of the carriage is raised from the base, the combination of a cam formed as a disk with part cut away revoluble by the clearout crank, with lifting means comprising a long bearing member pivoted to the carriage transversely of the base having at one end a power arm so bent as to engage with and be operative by the cam, and at the other end one or more lifting arms, the'arms of such lifting means being of such size and location that the lifting arm or arms engage the base and lift the carriage during a vpredetermined period while the clearout crank is being turned in one direction but are disengaged from the base and are idle when the clearout crank is turned in the other direction, together with a returning spring between the carriage and lifting member so arranged as to return the lifting means to its normal position.

2. In a calculating machine, having a base, a carriage movable transversely thereon and so connected thereto that part of it can be raised therefrom, a clearout crank carried by the carriage, and result dials carried by the carriage and operative by the clearout crank when said part of the carriage is raised from the base, the combination of a cam revoluble by the-clearout crank, with lifting means comprising a long bearing member pivoted to the carriage transversely of the base having at one end a power arm operative by the cam, and at the other end a lifting arm, the arms of such lifting means being of such size and location that the lifting arm engages the base and lifts the carriage during a predetermined period while the clearout crank is being turned in one direction but is disengaged from the base and is idle when the clearout crank is turned in the other direction.

3. In a calculating machine, having a base, a carriage movable transversely thereon and so connected thereto that part of it can be raised therefrom, a clearout crank carried by the carriage, and result dials car ried by the carriage and operative by the clearout crank when said part of the carriage is raised from the base, the combination of a cam revoluble by the clearout crank, with lifting means comprising a long bearing member pivoted to the carriage transversely of the base and operative by the cam, being of such size and location that it engages the base and lifts the carriage during apredetermined period while the clearout crank is being turned in one direction but is idle when the clearout crank is turned in the other direction.

4. In a calculating machine, having a base, a carriage movable transversely thereon and so connected thereto that part of it can be raised therefrom, a clearout crank carried by the cariage and result dials carried by the carriage and operative by the clearout crank when said part of the carriage is raised from the base, the combination of a cam revoluble by the clearout crank, and a lever operative by the cam, to engage the base and lift the carriage during a predetermined period while the clearout crank is being turned in one direction and idle when the clearout crank is turned in the other direction.

5. In a calculating machine having a base and a carriage movable transversely thereon and so connected thereto that part of it can be raised therefrom, a clearout crank carried at one end by the carriage, and result dials carried by the carriage and operative by the clearout crank when said part of the carriage is raised from the base, the combination of a cam in the form of a disk having a cut-away part and revoluble by the clearout crank, with lifting means including a transmission member extending from proximate the clearout crank to the base in whatever position the carriage may be, and a power member operative by the cam together with a lifting member in operative relation with the base.

In testimony whereof I have afiixed my 7 

